Question

$\huge\bold{QueStion}$A wire of length = l and resistance = R , if it streched such that its length becomes 3 times more of its initial one. Find the ratio of initial resistance to the newly obtained resistance.​

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Answer 1

Step-by-step explanation:

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Answer 2

Speed of car = 3 whole $\dfrac{1}{9}$ km/hr

=$\dfrac{28}{9}$ km/hr

time taken to travel x km=5 whole $\dfrac{1}{7}$ hours

=$\dfrac{36}{7}$ hr

we know that, distance = speed ${×}$ time

or, x = $\dfrac{28}{9}$ ${×}$ $\dfrac{36}{7}$ km

or, x = 16 km

So. the car will travel 16 km in $\dfrac{36}{7}$ hours

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